Dumbfounded

His people hadn't made a move, so that meant that it could only be Young Brother Feng who had done it? When did he make a move? How could it be that none of them had noticed anything?

At this time, waves of shock and horror coursed through each of their hearts. Fortunately, he wasn't malicious towards them, otherwise, they wouldn't even know when he attacked them. 

The grey-clothed old man murmured: "What kind of medicine can take down a Celestial Strong Exponent? It's even colourless and odourless? Unbelievable, just unbelievable…"

He was a physician, so naturally he knew that it was easy to bring down ordinary cultivators with medicine. However, the stronger the cultivator was, the less effective the medicine would be to them as stronger cultivators would be able to to detect it.